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A114103
n multiples of n such that a(n) is a multiple of n. The n-th group contains n multiples of n. Arranged sequentially the n-th term is a multiple of n.
3
1, 2, 6, 12, 15, 6, 28, 8, 36, 20, 55, 60, 65, 70, 15, 48, 102, 18, 114, 60, 42, 154, 161, 168, 175, 182, 189, 28, 232, 120, 248, 32, 264, 136, 280, 72, 333, 342, 117, 360, 369, 126, 387, 396, 45, 230, 470, 240, 490, 50, 510, 260, 530, 270, 110, 616, 627, 638, 649, 660, 671, 682, 693, 704, 715, 66
OFFSET
1,2
LINKS
FORMULA
T(n,k) = lcm(n,A000217(n-1)+k). - R. J. Mathar, May 10 2007
EXAMPLE
1, (2,6), (12,15,6), (28,8,36,20), (55,60,65,70,15),(48,102,18,114,60,42),...
MAPLE
A000217 := proc(n) n*(n+1)/2 ; end: T := proc(n, k) lcm(n, A000217(n-1)+k) ; end: for n from 1 to 20 do for k from 1 to n do printf("%d, ", T(n, k)) ; od ; od ; # R. J. Mathar, May 10 2007
MATHEMATICA
Flatten[Table[LCM[n, n (n - 1)/2 + k], {n, 11}, {k, n}]] (* Ivan Neretin, Jun 05 2015 *)
CROSSREFS
Sequence in context: A236264 A152301 A152389 * A334308 A242336 A285312
KEYWORD
nonn,tabl,look
AUTHOR
Amarnath Murthy, Nov 21 2005
EXTENSIONS
More terms from R. J. Mathar, May 10 2007
STATUS
approved